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drm/omap: ensure we have a valid dma_mask

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The omapdrm driver uses dma_set_coherent_mask(), but that's not enough
anymore when LPAE is enabled.

From Christoph Hellwig <hch@lst.de>:

> The traditional arm DMA code ignores, but the generic dma-direct/swiotlb
> has stricter checks and thus fails mappings without a DMA mask.  As we
> use swiotlb for arm with LPAE now, omapdrm needs to catch up and
> actually set a DMA mask.

Change the dma_set_coherent_mask() call to
dma_coerce_mask_and_coherent() so that the dev->dma_mask is also set.

Fixes: ad3c7b18c5 ("arm: use swiotlb for bounce buffering on LPAE configs")
Reported-by: "H. Nikolaus Schaller" <hns@goldelico.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c219e7e6-0f66-d6fd-e0cf-59c803386825@ti.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
This commit is contained in:
Tomi Valkeinen 2019-08-09 13:00:38 +03:00
parent 181ae88445
commit 63daf4e166
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/omapdrm/omap_drv.c
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@ -669,7 +669,7 @@ static int pdev_probe(struct platform_device *pdev)
if (omapdss_is_initialized() == false)
return -EPROBE_DEFER;
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret) {
dev_err(&pdev->dev, "Failed to set the DMA mask\n");
return ret;